| Reported in | Status | Registered by | ||
|---|---|---|---|---|
| Crenothrix | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Crenothrix polyspora T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Crenotalea | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Crenotalea thermophila T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Crassaminicella thermophila | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Crabtreella | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Crabtreella saccharophila T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Coxiella burneti | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Cowdria | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Cowdria ruminantium T | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium zhongnanshanii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium wankanglinii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium vitarumen | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium variabilis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium urinapleomorphum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium uberis | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium tuscaniae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium tritici | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium sepedonicum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium seminale | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium rathayi | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium pyogenes | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium pseudokroppenstedtii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium poinsettiae | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium paurometabolum | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium parakroppenstedtii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium oortii | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium nigricans | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium nebraskense | Unknown | Valid (ICNP) | Excubia bot over 3 years ago | |
| Corynebacterium mooreparkense | Unknown | Valid (ICNP) | Excubia bot over 3 years ago |